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40 lines
1.2 KiB
40 lines
1.2 KiB
var baseRest = require('./_baseRest'), |
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toInteger = require('./toInteger'); |
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/** Error message constants. */ |
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var FUNC_ERROR_TEXT = 'Expected a function'; |
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/** |
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* Creates a function that invokes `func` with the `this` binding of the |
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* created function and arguments from `start` and beyond provided as |
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* an array. |
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* |
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* **Note:** This method is based on the |
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* [rest parameter](https://mdn.io/rest_parameters). |
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* |
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* @static |
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* @memberOf _ |
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* @since 4.0.0 |
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* @category Function |
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* @param {Function} func The function to apply a rest parameter to. |
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* @param {number} [start=func.length-1] The start position of the rest parameter. |
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* @returns {Function} Returns the new function. |
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* @example |
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* |
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* var say = _.rest(function(what, names) { |
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* return what + ' ' + _.initial(names).join(', ') + |
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* (_.size(names) > 1 ? ', & ' : '') + _.last(names); |
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* }); |
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* |
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* say('hello', 'fred', 'barney', 'pebbles'); |
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* // => 'hello fred, barney, & pebbles' |
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*/ |
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function rest(func, start) { |
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if (typeof func != 'function') { |
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throw new TypeError(FUNC_ERROR_TEXT); |
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} |
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start = start === undefined ? start : toInteger(start); |
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return baseRest(func, start); |
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} |
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module.exports = rest;
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